Experimental Study on the Use of E-Waste Plastic as Partial Replacement of Coarse Aggregate in M30 Concrete

Rapid urbanisation has increased the consumption of natural aggregates in concrete, leading to environmental degradation and depletion of natural resources. Simultaneously, the generation of electronic waste (E-waste), particularly plastic components, has emerged as a major environmental challenge due to its non-biodegradable nature. This study investigates the feasibility of utilising shredded E-waste plastic as a partial replacement for natural coarse aggregates in M30 grade concrete. Concrete mixes were prepared with 0%, 5%, 10%, and 15% replacement of coarse aggregates by E-waste plastic. The workability of fresh concrete was evaluated using the slump test, while mechanical properties were assessed through compressive strength, split tensile strength, and flexural strength tests at curing ages of 7, 14, 28, 56, and 90 days. The results indicate a gradual reduction in workability and strength with increasing E-waste content. However, concrete containing 5% E-waste plastic exhibited mechanical performance comparable to conventional concrete, with marginal strength reduction and improved sustainability benefits. The study concludes that limited replacement of coarse aggregate with E-waste plastic is feasible for producing eco-friendly concrete suitable for selected structural and non-structural applications.